/*****************************************************************************/

/*
 *	stallion.h  -- stallion multiport serial driver.
 *
 *	Copyright (C) 1996-1998  Stallion Technologies
 *	Copyright (C) 1994-1996  Greg Ungerer.
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 *	This program is distributed in the hope that it will be useful,
 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *	GNU General Public License for more details.
 *
 *	You should have received a copy of the GNU General Public License
 *	along with this program; if not, write to the Free Software
 *	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*****************************************************************************/
#ifndef	_STALLION_H
#define	_STALLION_H
/*****************************************************************************/

/*
 *	Define important driver constants here.
 */
#define	STL_MAXBRDS		4
#define	STL_MAXPANELS		4
#define	STL_MAXBANKS		8
#define	STL_PORTSPERPANEL	16
#define	STL_MAXPORTS		64
#define	STL_MAXDEVS		(STL_MAXBRDS * STL_MAXPORTS)

/*
 *	Define a set of structures to hold all the board/panel/port info
 *	for our ports. These will be dynamically allocated as required.
 */

/*
 *	Define a ring queue structure for each port. This will hold the
 *	TX data waiting to be output. Characters are fed into this buffer
 *	from the line discipline (or even direct from user space!) and
 *	then fed into the UARTs during interrupts. Will use a classic ring
 *	queue here for this. The good thing about this type of ring queue
 *	is that the head and tail pointers can be updated without interrupt
 *	protection - since "write" code only needs to change the head, and
 *	interrupt code only needs to change the tail.
 */
struct stlrq {
	char *buf;
	char *head;
	char *tail;
};

/*
 *	Port, panel and board structures to hold status info about each.
 *	The board structure contains pointers to structures for each panel
 *	connected to it, and in turn each panel structure contains pointers
 *	for each port structure for each port on that panel. Note that
 *	the port structure also contains the board and panel number that it
 *	is associated with, this makes it (fairly) easy to get back to the
 *	board/panel info for a port.
 */
struct stlport {
	unsigned long magic;
	struct tty_port port;
	unsigned int portnr;
	unsigned int panelnr;
	unsigned int brdnr;
	int ioaddr;
	int uartaddr;
	unsigned int pagenr;
	unsigned long istate;
	int baud_base;
	int custom_divisor;
	int close_delay;
	int closing_wait;
	int openwaitcnt;
	int brklen;
	unsigned int sigs;
	unsigned int rxignoremsk;
	unsigned int rxmarkmsk;
	unsigned int imr;
	unsigned int crenable;
	unsigned long clk;
	unsigned long hwid;
	void *uartp;
	comstats_t stats;
	struct stlrq tx;
};

struct stlpanel {
	unsigned long magic;
	unsigned int panelnr;
	unsigned int brdnr;
	unsigned int pagenr;
	unsigned int nrports;
	int iobase;
	void *uartp;
	void (*isr) (struct stlpanel * panelp, unsigned int iobase);
	unsigned int hwid;
	unsigned int ackmask;
	struct stlport *ports[STL_PORTSPERPANEL];
};

struct stlbrd {
	unsigned long magic;
	unsigned int brdnr;
	unsigned int brdtype;
	unsigned int state;
	unsigned int nrpanels;
	unsigned int nrports;
	unsigned int nrbnks;
	int irq;
	int irqtype;
	int (*isr) (struct stlbrd * brdp);
	unsigned int ioaddr1;
	unsigned int ioaddr2;
	unsigned int iosize1;
	unsigned int iosize2;
	unsigned int iostatus;
	unsigned int ioctrl;
	unsigned int ioctrlval;
	unsigned int hwid;
	unsigned long clk;
	unsigned int bnkpageaddr[STL_MAXBANKS];
	unsigned int bnkstataddr[STL_MAXBANKS];
	struct stlpanel *bnk2panel[STL_MAXBANKS];
	struct stlpanel *panels[STL_MAXPANELS];
};

/*
 *	Define MAGIC numbers used for above structures.
 */
#define	STL_PORTMAGIC	0x5a7182c9
#define	STL_PANELMAGIC	0x7ef621a1
#define	STL_BOARDMAGIC	0xa2267f52

/*****************************************************************************/
#endif
